- a rib or riblike part.
- the midrib of a leaf in mosses.
- a ridge.
- Entomology.
- a vein, usually marginal, in the anterior portion of the wing of certain insects.
- the anterior edge or border of the wing of certain insects.
- Brazilian architect, chief designer of Brasilia.
- the technical name for rib 1 (def. 1)
- a riblike part, such as the midrib of a plant leaf